Insecticide.



umran STATES PATENT ora ion JOHN W. LAFER, F CATAWBA ISLAND, OHIO.

INSECTICIDE Specification of Letters Patent.

Patented March 9, 1909.

Application filed September 16, 1907. 8eria1 No. 398 ,048.

Potassium hydroxid oz. Sodium hydroxid 17 oz. Arsenious oxid 20 oz.'Chlorid' of iron, -(ferric chlorid,

preferred) 1 oz. Lime, unslaked 32 lbs. Sulfur, pulverized preferred 6lbs.

Water, substantially pure 100 gals.

The aforesaid ingredients are thoroughly mingled by the means of theagitation hereina fter set-forth, so that they will be fully acted uponby each other. v

' To ten ounces of water taken from the one hundred gallons add the.five. ounces of potassium hydroxid and apply heat: to the aforesaid addfive ounces ofsodium hydroxid dissolved by ten ounces of water takenfrom the remaining portion of the one hundred gallons and warmed, andthereafter agitate the same by applying heatto the extent of causing a slow boil: then add twenty ounces of arsenious oxid, substantially pure,and agitate all of. the aforesaid preparation by boiling for tenminutes, and permit the same to cool slowly thereafter: a chemicalreaction takes" place from the aforesaid,

wherefrom sodium arsenite and potassium arsenite is'formed: to theaforesaid add one ounce of chlorid of iron solution, preferably ferricchlorid, so that by chemical reaction ferric arsenite will have beenformed, and

agitate the preceding preparation by stirring well for a few moments andthereafter permit the sameto stand for a short time and ,then add thefollowingv preparation.

. Add sufiicient warmed water taken fromthe remaining portion of the onehundred gallons to slake three and three-quarters pounds of freshunslaked stone lime, substantially pure, whereby will be obtainedcalcium hydroxid, andto this add six pounds di-sulfid of an approximatedamount of twenty-five and sixty-five one-hundredths ounces, and all ofwhich agitate by -boiling,

for about three quarters of an hour, and in the mean time stir the sameto keep it in a very plastic state and extract therefrom the liquidwhich add to the preparation which herein before was permitted to standfor a time: on adding the extracted liquid a chemical reaction takesplace wherefrom is produced calcium arsenite to the'approximate amountof two and nine one-hundredths of an ounce which with the ingredientspreviously described is agitated by thoroughly mixing the same throughthe means of stirring and in the mean time the remaining portion of theone hundred gallons of water is added thereto,

In using the above described composition, the roots of the plants,shrubs and trees should be preferably'moistened and fed by saturating.the soil, in and about the base thereof, with the same: the compositioncan be readily applied however to other external portions of the plantor tree and will be absorbed and caused to circulate with the sap byinoculating the same.

By the use of the above described composition, the sap which isinoculated by the ingredientsthereof will cause the various worms,scales and insects to die and. become exterminated through the means offeeding on the same: and is further useful in destroying various diseasegerms of plants, shrubs and trees and will cause the same to regain, andto remain in a healthy condition.

I am aware that compositions containing some similar ingredients haveheretofore been used for external application on plants, shrubs andtrees for the purpose of killing disease germs, but I am not aware ofthe fact that any or all the ingredients of my senite and water, in thedescribed proporcomposition have ever been used together tions. 10 forsuch a purpose. v In testimony whereof I aflix my signature What Iclaim, and desire to secure by in presence of two witnesses. 5 LettersPatent of the United States, is- J OHN. W. LAFER.

An insecticide comprising sodium arsen- Witnesses: ite, potassiumarsenite, ferric arsenite, cal- U. G. TowNsEN'n,

cium di-sulfid, sodium di-sulfid, calcium ar- V J. V. DAVEY.

